These lizards are typical of many desert lizards and have adapted to live at very high temperatures. They like to have a background temperature of 90oc. I kept at long periods below this it would not survive. They also have to have high levels of ultra violet to enable them to produce vitamin D3 which is an important part of their digestion.
Picture taken at Whipsnade Zoo, July 2008.
Added:
8th Aug 2008 by Diane Earl
Subjects:
Biology
Key Stages:
Foundation, Key Stage 1, Key Stage 2, Key Stage 3, Key Stage 4, Key Stage 4+
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Saharan or Nigerian Dadd Lizard (Uromastyx geryi) 
